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Parkray Cumbria efficiency problem

Hi, we recently replaced our trianco tr45 burner with a parkray 99 (both smokeless fuel). The old burner used to make the house fabulously warm and heat the water so hot we had to run it off to stop the pipes banging when it boiled, the new burner seems much safer (boiling water was scary lol) but doesnt seem to heat the water or the house anywhere near as well.

We have the correct number of radiators for the model (3 less than max) but when we get the fire banked up high and turn on the pump it doesnt heat the radiators as well as the old one did (no air bubbles but just not as hot as they were) and it seems to take ages to heat them up.

When we turn the pump off to heat the water for a bath properly (as instructed in the manual) the radiators go stone cold in about 5 minutes, so the house gets cold, and with the pump on the water wont go above luke warm really. With the old burner we never needed to turn the pump off because the water was always hot anyway.

Should this be happening?
We seem to have a choice of nearly hot water or a nearly warm house.... seems we cant have both. Are we doing something wrong?

The heat seems to all stay in the burner, not much transferring to the water.

(We have a header tank and a hot water cylinder, 70's ex council house, trianco was in from then)

Please help! I'm using a tonne of coal and not getting very warm!

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  • Anonymous Dec 04, 2008

    Pump has one in and one out, and it is simply either switched on or off. We wait for the fire to get going really well (which takes an age for some reason, and much more coal than the trianco used) then switch on the pump. The heat just doesnt seem to be getting to the water in the back boiler, which makes no sense as it is essentially just a cast iron box!
    We have a ceramic lined flue (as no brick chimneys here) which is exactly as it was with the last burner, infact everything is exactly as it was because the old burner had exactly the same system, two pipes on left side two on right, we simply had the burner swapped when the old one burst.
    The water isnt even heating enough to make the pipes behind the burner properly hot, u can hold them even when the fire is going well.
    We have a separate emersion system thankfully, but we shouldn't have to use that to get the water properly hot when the fire has been lit for days!
    Where is all the heat going?

  • Anonymous Mar 21, 2014

    My eclipse will not heat above 37C & gradually drops in temperature if I remain in it for longer than 10 minutes; an issue also reported by others. It is at least 5 years old and the motor is very noisy, so I have removed it to give it a service or replace it, if necessary. I understand that waste heat from the motor is used to heat the water in this model which will always be a limiting factor.
    Q1 - Is there any way of improving the heating performance?
    Q2 - Surely a more efficient motor will generate less heat & so make the problem worse?
    Q3 - Has anyone plumbed a solar hot water element into the circuit (nothing found on youtube)?

  • Anonymous Mar 27, 2014

    geyser worked fine until first replacement of gas cylinder. now will only heat water to luke warm state. think gas line might be blocked as rest seems fine.

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Some circulation pumps have a 3 phase mixing valve (cold,warm,hot) to regulate the water pressure in the building; no way to know unless you trace the plumbing. Basically, the hot water temperature could be lost because the circ-pump is cooling it with the cold water supplied to it. This is used to balance the pressure (aka Pressure Balancing Circ-Pump), so heater is really working overtime to heat the water. If the pump has two in and one out that's more than likely your problem; but you should consult a "old-school" plumber in your area.

Posted on Nov 28, 2008

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